Analyzing Results on a Moving Surface
 

Hi. I want to analyze the force, work, power and energy that a buoy displaced by waves can produce in Fluent or CFD-Post. I can see options to get the force on the Y component of the entire buoy (the body) but I would like to analyze what happens only on the bottom surface, but the surface is constantly moving by the action of waves. All the options I see are for creating fixed surfaces. Is there a way to create a surface on a moving object? What would the best course of action to analyze this be?

Many thanks!